ACOUSTIC VELOCITIES AND DENSITIES OF POLYCRYSTALLINE ICE-IH, ICE-II, ICE-III, ICE-V, AND ICE-VI BY BRILLOUIN SPECTROSCOPY

The longitudinal and transverse speeds of sound of ice Ih, II, III, V, and VI have been measured by Brillouin spectroscopy in the range 0-10 kbar at -35.5 °C. The bulk adiabatic moduli derived from these measurements are 138.9, 98.7, 141.9, and 181.4 kbar for ice II, III, V, and VI, respectively, at pressures of 2.83, 2.76, 4.80, and 7.77 kbar, respectively. The isothermal compressions of the five phases have been measured directly by the contraction of a sample that was confined to a stainless-steel tube. © 1990 American Institute of Physics.